Certass is marking 20 years as a government licensed Competent Person Scheme, celebrating two decades of supporting installers to self certify Building Regulations compliance and deliver high standards in domestic window and door replacement work.

Licensed in 2006, Certass has grown into one of the most recognised and influential certification bodies in the sector, standing for technical credibility, installer competence and public trust.

Over the past twenty years, Certass has not only provided a compliance framework for installers, but has also helped build what is now glazing’s largest installer community.

Jon Vanstone, Chair of Certass, said: “Certass has always been about helping good installers demonstrate that they do things properly. As expectations around competence, evidence and accountability continue to rise, the role of trusted schemes has never been more important. Our focus is on keeping compliance practical, defensible, and genuinely supportive of the SME installer community.”

The anniversary comes at a pivotal moment for the home improvement sector, where consumer confidence and regulatory scrutiny are reported to be higher than ever.
Through its consumer facing platform, Certified Competent, Certass has built the glazing industry’s largest verified homeowner feedback system. To date, more than 127,000 homeowners have submitted reviews following certificate download, with 97% saying they would recommend their Certass installer. High nine scores across workmanship, reliability and customer service reflect the quality of work being delivered daily by Certass members.

Certass has also played a leading role in shaping the future of competence regulation in glazing. As government and regulators move toward stronger frameworks for assurance and accountability, Certass says it has been at the forefront of ensuring new expectations remain practical, proportionate and grounded in real installer practice.

As the scheme enters its third decade, Certass will continue investing in clearer technical resources, enhanced member support through its members area, and further initiatives designed to strengthen installer reputation and consumer trust.